package cn.edu.zxj.springblog.config;

import cn.edu.zxj.springblog.model.Result;
import com.fasterxml.jackson.databind.ObjectMapper;
import lombok.SneakyThrows;
import org.springframework.core.MethodParameter;
import org.springframework.http.MediaType;
import org.springframework.http.server.ServerHttpRequest;
import org.springframework.http.server.ServerHttpResponse;
import org.springframework.web.bind.annotation.ControllerAdvice;
import org.springframework.web.servlet.mvc.method.annotation.ResponseBodyAdvice;

/**
 * Created with IntelliJ IDEA.
 * Description： 设置统一返回类
 *
 * @author: zxj
 * @date: 2024-02-04
 * @time: 18:00:36
 */
@ControllerAdvice
public class ResponseAdvice implements ResponseBodyAdvice {
    @Override
    public boolean supports(MethodParameter returnType, Class converterType) {
        // 启用统一结果返回
        return true;
    }

    @SneakyThrows
    @Override
    public Object beforeBodyWrite(Object body, MethodParameter returnType, MediaType selectedContentType, Class selectedConverterType, ServerHttpRequest request, ServerHttpResponse response) {
        // 对body进行处理
        if (body instanceof Result) {
            return body;
        }

        // 对 String 类型特殊处理
        if (body instanceof String) {
            ObjectMapper objectMapper = new ObjectMapper();
            return objectMapper.writeValueAsString(Result.success(body));
        }

        return Result.success(body);
    }
}
